Gall, N., & Mayorga Alba, E. (1987). Brazil and Peru: Social and economic effects of petroleum development. International Labour Office.
Chicago-viite (17. p.)Gall, Norman, ja Eleodoro Mayorga Alba. Brazil and Peru: Social and Economic Effects of Petroleum Development. Geneva: International Labour Office, 1987.
MLA-viite (8. p.)Gall, Norman, ja Eleodoro Mayorga Alba. Brazil and Peru: Social and Economic Effects of Petroleum Development. International Labour Office, 1987.
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